Sae-20w
A bolt.
SAE is an acronym for the "Society of Automotive Engineers" and when used in conjunction with tool grade or measurement (not oil), is a standardized unit of non-metric measurement. Simply put, in measurements it means "Non-Metric". The name "SAE" used to grade motor oil has a totally different meaning, although instituted by the same society.
Society of Automobile EngineersSee Link below for more details.
SAE stands for Society of Automotive Engineers. Sae ratings pertain to the oils Viscosity. Viscosity is the flowability (resistance to flow) at a particular temperature.
If there are lines coming inward from the outside on the head then this is an SAE bolt, not metric. If there are three of these lines than it is a grade five bolt.
An SAE Grade 8 bolt will have 6 radial lines on it as shown below. \ | / / | \
SAE sets standard sizes and grades for bolts.Size and Grade are different:Size is set By the SAE (society of Automotive engineer's) and is stated as thickness followed by thread pitch followed by length 1/4 x 24 (threads per inch) x 1 1/14 (inches long) Grade Is a statement of strength and hardness. Most auto hardware tends to be grade 5 and some high strength stuff is grade 8 or grade 12
10.9 on a metric bolt indicates the hardness (or load, tensile strength, and hardness) of the bolt. This is almost as high as they get and is about the equivalent to a grade 8 SAE or USS bolt. 8.8 is also a common metric hardness.
Sae-20w
sae document j300 defines the highest single grade as 60. this is in reference to viscosity and not the quality of the oil
The length can vary just as with SAE
SAE 10w30
SAE 10w30 synthetic.
SAE viscosity grade
A bolt.
SAE 5W30 or 10W30 I would recommend the SAE 5w30 synthetic blend.